We have an HL-T5676S HDTV that we purchased in Sept. last year. We have Comcast Cable w/ the HD box. We also have several game systems we play on the TV. They are a Wii, XBOX 360 and a PS2. We also have a Toshiba HD DVD player, model HD-A3KU that is connected to the TV. All the components are seperately connected, in other words none of them are routed through the cable box but connect directly to the TV.
The problem we're having is there are very disinct horizontal lines covering the screen top to bottom and side to side. They started about 2 months ago and have been intermitent. The picture is barely visible through the lines.
We purchased the TV through Best Buy. Initially, when we contacted Best Buys' service department they suggested unplugging all the external components. This made the lines go away for a short time but they came back and then unplugging the components no longer solved the problem. We have unpugged the TV and let it sit for a few minutes and then plugged it back in again with no change in the picture. We even left the TV on for about two days straight and the lines finally went away but soon returned. At that time we made a service appointment but the earliest one was 2 weeks away. By the time the appointment day arrived, the lines were gone. Now it's 3 weeks later and the lines are back with no change after unplugging all components except the cable box. We have scheduled another service call but, again, it's almost 2 weeks away and we don"t have the use of our TV.
Is this a problem with the TV or something to do with one of our components? We'd like to solve this problem once and for all. Any light you could shed on this problem would be greatly appreciated.

Firstly, no, there are no speakers next to the TV. And I agree this is something for the pros if it involves replacement parts. The TV is still covered under our service aggreement through Best Buy. I was hoping it was something that we were able to do on our end before the service call that's 2 weeks away.Firstly, no, there are no speakers next to the TV. And I agree this is something for the pros if it involves replacement parts. The TV is still covered under our service aggreement through Best Buy. I was hoping it was something that we were able to do on our end before the service call that's 2 weeks away.

I'm having trouble seeing all of the responses for some reason. Please be patient with me while I try to access them. Thanks.I'm having trouble seeing all of the responses for some reason. Please be patient with me while I try to access them. Thanks.

I tried leaving a "problem fixed" rating as you suggested but when I roll my cursor over the "rate" bullet in the text I get a pop-up ad for an online trading website. It makes leaving a rating impossible (for me anyway) and I can't make it go away so I hit the icon with the 4 blue squares on it. Hope this gets the job done. I didn't know if you were aware of this situation or not. Seems a little contrary to leaving a positive comment to your efforts to resolve my problem. Thank you again for your help. I really do appreciate it.I tried leaving a "problem fixed" rating as you suggested but when I roll my cursor over the "rate" bullet in the text I get a pop-up ad for an online trading website. It makes leaving a rating impossible (for me anyway) and I can't make it go away so I hit the icon with the 4 blue squares on it. Hope this gets the job done. I didn't know if you were aware of this situation or not. Seems a little contrary to leaving a positive comment to your efforts to resolve my problem. Thank you again for your help. I really do appreciate it.

If you're really think that it will be hard for you to repair this I really suggest you to let a professional do the job for you..If you're really think that it will be hard for you to repair this I really suggest you to let a professional do the job for you..

Interesting There is a few problems it could be from the IC's that areused for convergence and horizontal hold and vertical hold. could justneed a manual alignment but youd want to change these capacitors. theresa capacitor at the back of the main board, next to the rear RCA inputs. Labeled 10uf 100v. heres what it may look like

Interesting There is a few problems it could be from the IC's that are
used for convergence and horizontal hold and vertical hold. could just
need a manual alignment but youd want to change these capacitors. theres
a capacitor at the back of the main board, next to the rear RCA inputs. Labeled 10uf 100v. heres what it may look like

No if i were you what i would tell them is to take a capacitation meter and test what ive showed you. Tell the service technician to tell you wether or not there faulty regardless if its happening. They may just need to be reseated on the board. But give him the information i have laid out for you.

No if i were you what i would tell them is to take a capacitation meter and test what ive showed you. Tell the service technician to tell you wether or not there faulty regardless if its happening. They may just need to be reseated on the board. But give him the information i have laid out for you.

They send it out for service just like before they had geek squad. You should have inhome service where they pick it up and take it. Then most circuit city and best buy have replacement tv for like 5 dollars or something that you can use while its out of a floor model thats comparable to your own.

They send it out for service just like before they had geek squad. You should have inhome service where they pick it up and take it. Then most circuit city and best buy have replacement tv for like 5 dollars or something that you can use while its out of a floor model thats comparable to your own.

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Had this happen on a Comcast box (Motorola DCT 6416 III)
Here's how to fix it:
Turn the cable box off, leave fully connected. Press Menu on the remote
The cable box internal menu will display (Not the Comcast one the Motorola one-- i.e. Display ratios-16:9 etc It's in black and white)
Use the arrows to cursor to the Closed Captioning and toggle to "Disabled" Press Manu again to exit and Voila!

i know this problem, happened to me with the comcast Motorola HD receiver box. The key is with the setting in the cable box.
Switch on the TV.
Set the channel to normal tuner channel 3 or HD input.
Turn off the cable HD box.
Press the Menu Button on the Cable box or the remote.
You should see a Menu.
Use the cursor keys to navigate
The default setup is also one of the option, Right click on your cursor keys acts like the computer keyboard enter key and applies the change.
The default setup is 16:9, the shacking would happen if you have set the picture type to "PAN SCAN". change it to either 16:9 or 4:3 Letter Box. The shacking should stop.
Hope it helps.